PCM2903C: Temperature questions

Adam Daluga

Part Number: PCM2903C

Hello,

I was looking at using the PCM2903C in an upcoming project and have a few questions about its temperature rating. Our project requires industrial temperature ratings (-40C to 85C) for all the parts used. The PCM2903C datasheet describes the ambient temperature under bias to be -40C to 125C while the operating temperature is -25C to 85C.

Has the part been tested at -40C?
Does "under bias" simply mean the part is powered, or are there other specific conditions needing to be met?
Will the part reliably come out of reset and function if booted at -40C?
Are there any associated risks of cold booting the PCM2903C at -40C and outputting audio while getting warmer?
What determined the -25C limit? Was it to limit the THD, and SNR?

Thanks for the help!

Best,

Adam

over 5 years ago

0 Tom Hendrick over 5 years ago

TI__Guru**** 183381 points

Hi Adam,

If you look through section 7.6.1, you will find various plots of performance over the operating temperature range for the PCM2903C. The graphs match the minimum specifications. 'Under bias' implies the device was certainly powered up, but I don't have details on it's operational state at -40C. We'll look into that for you but it may be next week (after the Thanksgiving break) before we have any additional detials.

0 Adam Daluga over 5 years ago in reply to Tom Hendrick

TI__Expert 6615 points

Thank you Tom. Any update here?

0 Tom Hendrick over 5 years ago in reply to Adam Daluga

TI__Guru**** 183381 points

Hi Adam,

Unfortunately, no - I cannot find more characterization data or any detail on the operational state at -40C.

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PCM2903C: Temperature questions